介紹:

deal n.
交易；買賣；
She got a new car for $1000! That was really a good deal!
她一千美金買了輛車！真是撿了個大便宜！

a big deal
①重要的事情
He got promoted last month. That was a big deal to him!
他上個月升職了。這對他來說是個大事。

②重要的人物
I was kind of a big deal in high school.
高中時候我可是風云人物。

③有什么大不了的！（表示不屑）
A: Hey. I could do one-arm push-ups.
喂，我能做單手俯臥撐.
B: Big deal! I can do push-ups without using my hands!
有什么大不了！我可以不用手做！

deal in
經(jīng)營；做… 的生意
My dad deals in medical supplies these days, selling X-ray and MRI machines to hospitals.
我爸爸做醫(yī)療用品的生意，就是往醫(yī)院賣X光和核磁共振的一些設備。